5 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:N/I:N/A:P
0.065 Low
EPSS
Percentile
93.7%
The pkinit_check_kdc_pkid function in
plugins/preauth/pkinit/pkinit_crypto_openssl.c in the PKINIT implementation
in the Key Distribution Center (KDC) in MIT Kerberos 5 (aka krb5) before
1.10.4 and 1.11.x before 1.11.1 does not properly handle errors during
extraction of fields from an X.509 certificate, which allows remote
attackers to cause a denial of service (NULL pointer dereference and daemon
crash) via a malformed KRB5_PADATA_PK_AS_REQ AS-REQ request.